Scheduled time for Public Observing: 9pm – 11pm

Solar System Objects:

The Moon: will be 25° high in the South at 9pm, and 82% illuminated, Waxing Gibbous phase. An interesting feature to observe tonight is Sinus Iridium (The Bay of Rainbows). It’s a very large crater, 154 miles across, that was flooded with lava from Mare Imbrium.

Image copyright (c) Virtual Moon Atlas /

Planets: Jupiter and Saturn will both be visible, Jupiter will be getting low in the sky by 10pm. The position of their brightest satellites at 10pm is shown below. Jupiter’s four largest moons, Io, Europa, Ganymede, and Callisto are visible in binoculars, and Saturn’s moon Titan in almost any telescope.

Images courtesy of Starry Night (R) Orion Special Edition, Version: 6.2.3 kcEW, Imaginova (R) Corp.

Star Charts and other Information:

A very useful monthly star chart can be downloaded here from, giving information on objects visible with the unaided eye, binoculars, or telescope.

For current astronomical events see Sky and Telescope Magazine’s “This Week’s Sky at a Glance”.